Granted Patent
Utility
US 5,225,643 · App. 07/852,474
Differential pressure switch for stored gas pressure vessel
Inventor:
Brent R. Marchant
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Mar 17, 1992
Inventor
Brent R. Marchant
Assignee (at issue)
Morton International, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.